De Silva, G. H. M. J. S.; De Silva, G. S. Y.; Chathurangani, O. S.
(University of Ruhuna, Wellamadama, Matara, 2012-02-22)
Today noise control has become a major requirement with increasing of harmful
effects for the people caused by industrial noise. This can be achieved when the
intensity of sound is brought down to a level that is not ...